Peer-reviewed veterinary case report
Penile vascular tumors causing bleeding and urination issues in dogs
By Vallesi, E et al.·Published in Veterinary research communications·2026·Reproforpets-Clinica Veterinaria Dott.ssa Beccaglia, Italy·View original on PubMed →
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Original publication title: Unusual cases of penile vascular tumors in dogs: report of two cases.
- Species:
- dog
Plain-English summary
A 5-year-old male Labrador was brought in for blood in his urine and difficulty urinating. During the examination, the vet found a mass on his penis, which was surgically removed. The mass turned out to be a hemangiosarcoma, a type of malignant tumor. In another case, a 7-year-old male Beagle had bleeding from his prepuce, and a different mass was also surgically removed, which was identified as a hemangioma, a benign tumor. Both dogs underwent surgery, but the prognosis differed due to the nature of their tumors.
People also search for: dog blood in urine · dog penis tumor treatment · hemangiosarcoma in dogs · dog preputial bleeding · dog surgery for penile mass
Abstract
Vascular tumors affecting the reproductive tract in male dogs, including hemangiomas and hemangiosarcomas, are rarely reported in veterinary medicine. However, they are more frequently observed in other anatomical sites in dogs such as the skin, spleen, and the liver. Despite their low incidence in the genital region, these neoplasms should be considered when compatible clinical signs are observed. This case report describes the clinical and pathological findings of two penile vascular neoplasms in dogs, highlighting their differing prognoses. The first case was classified as hemangiosarcoma and the second case as hemangioma. The first patient was referred for hematuria and stranguria; while the second dog showed haematic preputial bleeding. In both cases, protruding masses of the penile mucosa were identified and surgically removed with an excisional surgery. Histopathological analysis confirmed their vascular origin, allowing definitive diagnosis. Given that clinical signs can be nonspecific and overlap with other urogenital disorders, histopathology plays a crucial role in guiding surgical management, establishing prognosis, and differentiating between benign and malignant vascular tumors.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/41569360/